1. Preheat the oven to 180ºC. Boil the milk and then pour into a small bowl. Add the tea leaves and let it rest for 5 minutes.
2. In another mixing bowl, mix all the other ingredients together. Strain the tea into this bowl, being careful to not let any tea leaves through.
3. Mix well to combine. Line a 6-grooved cupcake tray with liners. Spoon the mixture into each and bake in the preheated oven for about 20 minutes, until risen, and a skewer pushed through comes out clean.
4. Remove from the tray and cool on a wire rack. Dust some vanilla sugar over. Eat slightly warm.